Preparing method and use method of chlorinated organic compound polluted soil repairing agent
A technology for organic pollution and soil remediation, applied in the field of soil pollution control, can solve the problems of long processing time and low water solubility, and achieve the effect of high reaction effect, reduction of operation difficulty and cost saving.
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[0022] Example 1:
[0023] The bentonite particles were added to deionized water, stirred for 8 hours, and centrifuged at 625 rpm for 7 minutes at low speed. According to the bentonite dosage 35g / L, add the bentonite particles to the 0.1M FeCl3 solution, mix for about 24 hours under the action of magnetic stirring, centrifuge to discard the supernatant, and repeat the above process twice to obtain Fe 3+ Saturated bentonite particles, then add deionized water for cleaning. After the iron ion saturated bentonite particles are put into deoxygenated deionized water, the pH of the solution is adjusted to 3 with 1M hydrochloric acid. Under the protection of inert gas, the NaBH 4 Quickly add to the particle slurry (NaBH 4 The molar ratio to Fe is 30:1), quickly close the cap, react at room temperature for 2 minutes, and centrifuge at high speed to obtain supported ultrafine zerovalent iron. The weight of 30 times the weight of the supported ultrafine zero valent iron particles is mixed ...
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[0027] Example 2:
[0028] The bentonite particles were added to deionized water, stirred for 6 hours, and centrifuged at 600 low speed for 10 minutes. Add 20g / L of bentonite, and add the bentonite particles to 0.1M FeCl 3 In the solution, mix for about 24 hours under the action of magnetic stirring, centrifuge to discard the supernatant, repeat the above process 3 times to obtain Fe 3+ Saturated bentonite particles, then add deionized water for cleaning. After putting iron ion saturated bentonite particles into deoxygenated deionized water, adjust the pH of the solution to 2 with 1M hydrochloric acid, and under the protection of inert gas, the NaBH 4 Quickly add to the particle slurry (NaBH 4 The molar ratio to Fe is 25:1), quickly close the cap, react for 1 minute at room temperature, and centrifuge at high speed to obtain supported ultrafine zerovalent iron. Mix the 95% propanol solution with a weight of 20 times the weight of the ultra-fine zero-valent iron particles with a p...
Example Embodiment
[0034] Example 3:
[0035] The bentonite particles were added to deionized water, stirred for 9 hours, and centrifuged at 650 rpm for 5 minutes at low speed. According to the bentonite dosage of 45g / L, add the bentonite particles to the 0.1M FeCl3 solution, mix for about 24 hours under the action of magnetic stirring, centrifuge to discard the supernatant, and repeat the above process twice to obtain Fe 3+ Saturated bentonite particles, then add deionized water for cleaning. After the iron ion saturated bentonite particles are put into deoxygenated deionized water, the pH of the solution is adjusted to 3 with 1M hydrochloric acid. Under the protection of inert gas, the NaBH 4 Quickly add to the particle slurry (NaBH 4 The molar ratio to Fe is 30:1), quickly close the cap, react at room temperature for 2 minutes, and centrifuge at high speed to obtain supported ultrafine zerovalent iron. Ethanol with a purity of 95% or more is mixed with the supported ultrafine zero valent iron in...
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